WO1993025043A1 - Imaging system with dead element concealment - Google Patents
Imaging system with dead element concealment Download PDFInfo
- Publication number
- WO1993025043A1 WO1993025043A1 PCT/GB1993/000896 GB9300896W WO9325043A1 WO 1993025043 A1 WO1993025043 A1 WO 1993025043A1 GB 9300896 W GB9300896 W GB 9300896W WO 9325043 A1 WO9325043 A1 WO 9325043A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- array
- imaging system
- dead
- output
- Prior art date
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 230000004075 alteration Effects 0.000 description 4
- 238000012935 Averaging Methods 0.000 description 3
- 238000003491 array Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/48—Increasing resolution by shifting the sensor relative to the scene
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/68—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to defects
- H04N25/69—SSIS comprising testing or correcting structures for circuits other than pixel cells
Definitions
- This invention relates to imaging systems and particularly to solid state systems comprising an array of photoelectric elements, or staring array, for imaging electromagnetic radiation, generally in the visible or infra-red wavebands.
- GB 215 781 proposes shifting the image relative to the array by a fraction, such as a half or a quarter, of the inter element pitch in either one or both of the coordinate directions of the array. This has the effect of reducing the pitch and hence the spatial frequency of the image which can be reproduced without aliasing.
- the displacement means is preferably adapted to displace the image at least once in each coordinate direction of the array per cycle of displacement. This means that each resolvable area, away from the edge of the image, will be incident on at least four different elements per cycle. In practice this means that the chance of getting less than two actual output readings for any resolvable area per cycle of four displacements is virtually zero.
- Figure 2 illustrates part of rhe system of Figure 1 in more detail
- the refracting plate 4 is replaced by a mirror 11 in object space, as shown in Figure 3-
- the mirror is also mounted such that it can be tilted through an angle 0 in order to cause image displacement D, relative to the array, equal to one and a half times the inter element pitch.
- the equation required to calculate the necessary angle of tilt is:
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6500276A JPH08500944A (en) | 1992-05-29 | 1993-04-29 | Image forming system that hides dead elements |
EP93911891A EP0642723A1 (en) | 1992-05-29 | 1993-04-29 | Imaging system with dead element concealment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929211566A GB9211566D0 (en) | 1992-05-29 | 1992-05-29 | Imaging system |
GB9211566.6 | 1992-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993025043A1 true WO1993025043A1 (en) | 1993-12-09 |
Family
ID=10716331
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1993/000896 WO1993025043A1 (en) | 1992-05-29 | 1993-04-29 | Imaging system with dead element concealment |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0642723A1 (en) |
JP (1) | JPH08500944A (en) |
CA (1) | CA2136645A1 (en) |
GB (1) | GB9211566D0 (en) |
IL (1) | IL105794A (en) |
WO (1) | WO1993025043A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0836318A2 (en) * | 1996-10-08 | 1998-04-15 | Sharp Kabushiki Kaisha | Image pickup apparatus having image shifting means |
GB2319426A (en) * | 1996-11-15 | 1998-05-20 | Sagem | Video camera with image displacing member controlled for image resolution improvement, camera element response equalisation and camera vibration compensation |
FR2792149A1 (en) * | 1999-04-12 | 2000-10-13 | Commissariat Energie Atomique | Medical imaging pixel camera faulty pixel zone removal has two horizontal and vertical camera step movements enabling detection faulty pixel image |
WO2001052525A2 (en) * | 2001-03-30 | 2001-07-19 | Sinar Ag | Digital photography method and digital camera |
GB2421654A (en) * | 2004-12-23 | 2006-06-28 | Lfk Gmbh | Replacement of defective pixels with pixels in preceding frames in focal plane array cameras |
WO2011086227A1 (en) * | 2010-01-18 | 2011-07-21 | Nokia Corporation | Digital camera image error detection |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4603454B2 (en) * | 2005-10-05 | 2010-12-22 | 本田技研工業株式会社 | Image sensor fixed pattern noise removal device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2140649A (en) * | 1983-04-08 | 1984-11-28 | Citizen Watch Co Ltd | Correcting for faulty photodetectors in an image pickup system |
EP0131387A2 (en) * | 1983-06-15 | 1985-01-16 | Kabushiki Kaisha Toshiba | Solid state image sensor with high resolution |
WO1988002971A1 (en) * | 1986-10-17 | 1988-04-21 | Kenneth Gural | Solid state imaging device having means to shift the image between scans and associated circuitry to improve the scanned image |
GB2241401A (en) * | 1990-02-21 | 1991-08-28 | Plessey Co Ltd | Defective sensor detection in sensor arrays |
EP0483530A2 (en) * | 1990-10-30 | 1992-05-06 | ELTRO GmbH Gesellschaft für Strahlungstechnik | Method and device for offset and response harmonization in an electrooptical linear or mosaic sensor |
-
1992
- 1992-05-29 GB GB929211566A patent/GB9211566D0/en active Pending
-
1993
- 1993-04-29 JP JP6500276A patent/JPH08500944A/en active Pending
- 1993-04-29 CA CA002136645A patent/CA2136645A1/en not_active Abandoned
- 1993-04-29 WO PCT/GB1993/000896 patent/WO1993025043A1/en not_active Application Discontinuation
- 1993-04-29 EP EP93911891A patent/EP0642723A1/en not_active Ceased
- 1993-05-24 IL IL10579493A patent/IL105794A/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2140649A (en) * | 1983-04-08 | 1984-11-28 | Citizen Watch Co Ltd | Correcting for faulty photodetectors in an image pickup system |
EP0131387A2 (en) * | 1983-06-15 | 1985-01-16 | Kabushiki Kaisha Toshiba | Solid state image sensor with high resolution |
WO1988002971A1 (en) * | 1986-10-17 | 1988-04-21 | Kenneth Gural | Solid state imaging device having means to shift the image between scans and associated circuitry to improve the scanned image |
GB2241401A (en) * | 1990-02-21 | 1991-08-28 | Plessey Co Ltd | Defective sensor detection in sensor arrays |
EP0483530A2 (en) * | 1990-10-30 | 1992-05-06 | ELTRO GmbH Gesellschaft für Strahlungstechnik | Method and device for offset and response harmonization in an electrooptical linear or mosaic sensor |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 8, no. 155 (E-256)19 July 1984 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0836318A2 (en) * | 1996-10-08 | 1998-04-15 | Sharp Kabushiki Kaisha | Image pickup apparatus having image shifting means |
EP0836318A3 (en) * | 1996-10-08 | 1999-11-17 | Sharp Kabushiki Kaisha | Image pickup apparatus having image shifting means |
GB2319426A (en) * | 1996-11-15 | 1998-05-20 | Sagem | Video camera with image displacing member controlled for image resolution improvement, camera element response equalisation and camera vibration compensation |
GB2319426B (en) * | 1996-11-15 | 2000-11-29 | Sagem | A video camera having deviating means for improving resolution |
US6249312B1 (en) | 1996-11-15 | 2001-06-19 | Sagem Sa | Video camera having deviating means for improving resolution |
FR2792149A1 (en) * | 1999-04-12 | 2000-10-13 | Commissariat Energie Atomique | Medical imaging pixel camera faulty pixel zone removal has two horizontal and vertical camera step movements enabling detection faulty pixel image |
WO2001052525A2 (en) * | 2001-03-30 | 2001-07-19 | Sinar Ag | Digital photography method and digital camera |
WO2001052525A3 (en) * | 2001-03-30 | 2002-01-31 | Sinar Ag | Digital photography method and digital camera |
GB2421654A (en) * | 2004-12-23 | 2006-06-28 | Lfk Gmbh | Replacement of defective pixels with pixels in preceding frames in focal plane array cameras |
WO2011086227A1 (en) * | 2010-01-18 | 2011-07-21 | Nokia Corporation | Digital camera image error detection |
Also Published As
Publication number | Publication date |
---|---|
IL105794A (en) | 1996-09-12 |
EP0642723A1 (en) | 1995-03-15 |
CA2136645A1 (en) | 1993-12-09 |
JPH08500944A (en) | 1996-01-30 |
IL105794A0 (en) | 1993-10-20 |
GB9211566D0 (en) | 1992-07-15 |
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